Examlex
Which of the following statements about ethnic differences in average longevity is true?
Radially Symmetrical
An attribute of organisms that can be divided into identical halves along any plane that passes through the central axis, common in many jellyfish and sea anemones.
Cnidarians
A phylum of aquatic invertebrate animals that includes jellyfish, corals, and sea anemones, characterized by their specialized stinging cells called cnidocytes.
Echinoderms
A phylum of marine animals characterized by radial symmetry, a calcareous skeleton, and a complex water vascular system, including starfish, sea urchins, and sea cucumbers.
Arthropods
Invertebrate animals having an exoskeleton, a segmented body, and paired jointed appendages.
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